11387121 has 16 divisors (see below), whose sum is σ = 15523200. Its totient is φ = 7423488.

The previous prime is 11387087. The next prime is 11387143. The reversal of 11387121 is 12178311.

It is a happy number.

11387121 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11387121 - 2⁷ = 11386993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11387091 and 11387100.

It is not an unprimeable number, because it can be changed into a prime (11387171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31540 + ... + 31898.

It is an arithmetic number, because the mean of its divisors is an integer number (970200).

Almost surely, 2^11387121 is an apocalyptic number.

It is an amenable number.

11387121 is a deficient number, since it is larger than the sum of its proper divisors (4136079).

11387121 is a wasteful number, since it uses less digits than its factorization.

11387121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568.

The product of its digits is 336, while the sum is 24.

The square root of 11387121 is about 3374.4808489603. The cubic root of 11387121 is about 224.9769260289.

The spelling of 11387121 in words is "eleven million, three hundred eighty-seven thousand, one hundred twenty-one".